  <div class="form-group">
    <div class="col-sm-5">
      <div class="input-group">
        <input type="hidden"  value="" id="post_id" />
        <input type="text"  name="postName" class="form-control" id="pName" jac_url="#(jxwebpath.item)service/post/list/"  jac_id="post_id"/>
        <div class="input-group-btn">
          <button type="button" class="btn btn-white dropdown-toggle" data-toggle="dropdown">
            <span class="caret"></span>
          </button>
          <ul class="dropdown-menu dropdown-menu-right" role="menu">
          </ul>
        </div>
      </div>
    </div>
  </div>